Cylinder-forming machine



H. L. WEED CYLINDER FORMING MACHINE.

APPLICATION FILED MAY 11, 1911.

1,328,409, Patented J an. 20, 1920.

2 SHEETS-SHEET l.

Hal/ward L. W660,

H. ,L. WEED.

CYLINDER FORMING MACHINE.

APPLICATION FILED MAY11,I917.

Patented J an. 20, 1920.

2 SHEETSSHEET 2.

till: I

Howard L. Ween, I

afiozncvs UNITED STATES PATENT OFFICE.

HOl/VARD L. WEED, F DETROIT, MICHIGAN.

CYLINDER-FORMING Iv'IACHINE.

Application filed May 11, 1917.

To all whom it may concern:

Be it .znown that l, Howl-inn L. Vfnnn, a citizen of the United States,and residing at Detroit, in the county of l llayne and State ofMichigan, have invented a new and Improved Cylinder -Forming Machine, ofwhich the following is a specification.

In forming the cylinders of rotary en gines and other devices thatinclude an an nular cylinder of circular cross-section it has beencustomary to divide the casing and bore the half-c ndrical surfacesseparately. When the par 3 so formed are assembled, the meeting edges ofthe half-cylinders very seldom exactly register with one another and ithas therefore been difficult to secure a close seal between. the pistonsand the cyliderwall.

To the end of overcoming the objection above stated, the presentinvention consists in means for boring, gr nding or dressing the entiresurface. of the cylinder in one op eration by means of a tool whichrot-ates about the axis of the cylinder. The tool and cylinder, ofcourse, have relative movement longitudinally of said axis. Theinvention also consists in a boring, grinding or linishing tool mountedto swing about the axis of a shaft which is itself arranged (to-axiallywith tie bearings upon which the engine shaft to be finally carried,said tool also being rotatable about the a is of the annular cylinderor, in other words, in a plane which includes the axis of the shaft. inthe embodiment shown, the engine casing is lined and the tool swingsabout its axis, but the ruction might be reversed to cause the g torotate while the tool remains in a listed plane. The essential conditionis that a relative movement be established. Again, the inventionconsists in a particular form of driving mechanism'for the tool; it further consists in the details of construction shown, described andclaimed. The invention also consists in an improved process or methodfor grinding the cylindrical surface.

In the drawings, Figure 1 is a fragmentary longitudinal section showingthe device in position within the casing of a rotary engine. Fig. 2 is aperspective view of the hollow main shaft. Fig. 8 is a section on theline 3-3 of Fig. 1. Figs. l and 5 are end and side views of a hood orcasing element that may be used for the bevel gears, and Figs. 6 and 7are similar views of another Specification of Letters Patent.

Patented Jan. 20, 1920.

Serial No. 182L994.

casing element for deflecting droppings from the worm and worm wheel.

1 and 2 designate the half sections of the casing the actualconstruction of which may vary widely. The end walls 3 of the sectionsare shown provided with alined annular flanges 4 (previously accuratelyfinished) in which an engine shaft, not shown, is to be ultimatelysupported on suitable bearings. The sections of the casing are shapedroughly to form half annular cylinders 5 and 6 with perforated flanges 8through which bolts 9 may be inserted to draw the sections toward eachother. A space is left between the inner margins 10 of the cylindricalsurfaces to receive the rotor or rotors, or he like. The casing isusually provided with one or more peripheral passages 11 leading to thecylinder, which, during the boring or grinding operation, are preferablyarranged at the bottom to allow the cuttings or dust to drop out freely.

Mounted to rotate in the flanges l is a hollow shaft 12 which isslowlyturned by any desired means, for example, by the gears 13 and 14and the shaft 15. Rig-idly secured on the central portion of the shaftin any suitable way is a radial arm 18 having a divided end, thefur-cations 19 and 20 of which project through the slot between thefaces 10 and support a shaft 21, a suit able bushing or hearing 22 beingemployed, if desired. This shaft carries a tool which may be of any typesuitable for borgrinding or otherwise dressing or linishing thecylinder, the working surface of the tool being arranged in a plane thatsub stantially includes the axis of the shaft 12.

Various n'iea-ns may be employed for 'lriv ing the tool but it ispreferred to use the bevel. gears 26 and 28, the shaft 29 {parallel tothe plane of the rotating tool), the worm wheel 30, the Worm 31 and wormshaft 32 that may be rapidly driven by the pulley 33 and belt 3%. Aportion of the wall of the hollow shaft is removed as indicated at 35,Fig. 2, to allow the worm wheel to mesh with the worm. Suitable bearings38 are of course, provided for the worm shaft.

. In order to exclude cuttings and dust from the gears 26 and 28, adetachable hood 40, which may be partly filled with lubricant, isprovided; likewise a hood or shield 41 may be employed for deflectingthe cuttings away from the worm and worm wheel.

In use, the gear 13 and the pulley 33 are removed, and the casingsections are slipped onto the ends of the shaft 12. The bolts 9 areinserted but are drawn up at first only far enough to cause the tool totake the roughing cut, and are thereafter gradually tightened, as willbe readily understood. The tools are changed as required, the boltsbeing unscrewed for the purpose.

It is obvious that the details of construction may be changed withinwide limits without departing from the spirit of the invention, and I donot, therefore, wish to be limited otherwise than as indicated by thesubjoined claims.

I claim 1. Means for forming a cylindrical surface having a circularaxis comprising a hollow shaft and means to continuously rotate it inone direction, a second shaft within the hollow shaft and means tocontinuously rotate it in one direction, an arm secured to the hollowshaft, a cutting tool and a shaft therefor journaled in the outer end ofsaid arm in a plane at substantially right angles to the axis of thehollow shaft, and means to drive the cutting tool from said secondshaft.

2. Means for forming a cylindrical surface having a circular axiscomprising a hollow shaft and means to continuously rotate it in onedirection, a second shaft within the hollow shaft and means tocontinuously rotate it in one direction, an arm secured to the hollowshaft, a cutting tool and a shaft therefor j ournaled in the outer endof said arm in a plane at substantially right angles to the axis of thehollow shaft, and means to drive the cutting tool from said secondshaft, said means comprising a fourth shaft extending from the hollowshaft to the cutter shaft, bevel gears connecting the fourth shaft tothe cutter shaft and a worm and worm wheel connecting the fourth shaftto the second shaft.

3. Means for forming a cylindrical sur face having a complete circularaxis comprising a rotatable support and bearings therefor, means tocontinuously rotate the support in one direction, a shaft within thesupport, an arm on the support, a rotatable cutter mounted at the outerend of the arm on an axis coincident with said circular axis, anddriving means connecting said cutter and said shaft.

4. Means for forming an annular cylin drical surface, comprising a shafthaving its axis co-incident with a line perpendicular to the plane ofthe circular axis of said surface at its mid-point, said shaft beingarranged to cooperate with the material to be worked upon to hold theparts in proper relative position, a tool supported by the shaft andpositively rotated about the axis of said surface, and means forestablishing relative rotation between the shaft and said material aboutthe axis of said shaft.

5. Means for forming an annular cylinder having a circular axis, saidmeans comprising a hollow shaft arranged centrally of and at rightangles to the surface inclosed by the circular axis, an arm attached tosaid shaft, a tool carried by said arm, said tool being rotatable aboutthe circular axis, means for swinging the shaft about its axis, andmeans, including a second shaft projecting into the hollow shaft, forrotating the tool at an angular speed greater than that of the hollowshaft.

6. Means for forming an annular cylinder having a circular axis, saidmeans comprising a hollow shaft arranged centrally of and at rightangles to the surface inclosed by the circular axis, an arm attached tosaid shaft, a tool carried by said arm, said tool being rotatable aboutthe circular axis, means for swinging the shaft about its axis, andmeans for rotating said tool, including a second shaft projecting intothe hollow shaft, a worm on said second shaft, a third shaft parallel tothe arm, a worm wheel on said third shaft and driven by said worm, afourth shaft carried by said arm, said fourth shaft being at rightangles to the third shaft and supporting the tool, and means for drivingthe fourth shaft from the third shaft.

7. Means for forming an annular cylindrical surface, comprising a hollowshaft having its axis co-incident with a line perpendicular to the planeof the circular axis of said surface at its mid-point, said shaft 100being arranged to cooperate with the material to be worked upon to holdthe parts in proper relative position, a rotatable tool supported by theshaft, means for establishing relative rotation between the shaft 105and said material about the axis of said shaft, and means for positivelyrotating said tool about the circular axis of said surface, said lastnamed means including a shaft entering the opening in the hollow 110shaft.

HOWARD L. WEED.

